But what was immediately apparent was how receptive those who had been flagged down, with the vast majority being Welsh speakers and jovially conversing in their native tongue with the PC from Dyffryn Nantlle.

During the day, many motorists expressed their appreciation that the issue of drink driving is being targeted head-on.

One of these was Nest Jones from Llanfairpwll.

She said: “I think its a very positive move and I have no problem at all, although this is the first time I’ve ever been asked to take the test!

“But I believe that operations like this can do nothing but good, keeping our roads safer should be paramount.”

The next port of call was Bangor, followed by another roadside check on the A5 in Bethesda by PC Andrew Collis.

It was a similar pattern in all areas covered, and pleasingly, no motorists out of the hundreds that were pulled-in over a 90 minute period provided a positive test.

Sgt Emlyn Hughes said: “We always aim to cover a reasonably wide area, although the destinations vary from day to day.

“The overwhelming majority of those pulled over are more than happy to be checked and are pleased that we are carrying out such operations.

“We realise that most people will be going out to parties and social events over Christmas and education has played a big part in making drink and drug driving socially unacceptable.

“Unfortunately, many people don’t realise they can still be over the limit the morning after.

“As a force, we’d urge everyone to think twice before getting behind the wheel, and consider making alternative arrangements to get to work or wherever they need to be.”